JFK's Secret Service agents reflect on loss of a president

Arlington, Virginia (CNN) -- After mostly avoiding the spotlight for decades, many of the former U.S. Secret Service agents who were assigned to protect President John F. Kennedy are now offering their accounts of the day he was assassinated, 47 years ago Monday.

After the first shot hit the president, former agent Clint Hill says, "I saw him grab at his throat and lean to his left. So I jumped and ran." Hill is the man seen running toward the limousine in the famous film of the shooting, captured by a bystander named Abraham Zapruder. Hill jumped onto the back of the presidential car, in a desperate attempt to protect the president.

"Just before I got to the car, the third shot hit him in the head." Hill says."It was too late."...